Molecular function

class 1 mPTS binding

Binding to a class I peroxisomal membrane targeting sequence, any of several sequences of amino acids within a protein that can act as a signal for the localization of the protein into the peroxisome membrane in a PEX19-dependent manner.

PEX19-dependent mPTS binding

Currently identified mPTSs vary greatly in length, and cannot be distinguished by primary structure analysis, suggesting that the peroxisomal sorting information is not contained within a specific amino acid sequence. There do however appear to be two classes of mPTSs: class 1 mPTSs that are bound by PEX19 and imported in a PEX19-dependent manner, and class 2 mPTSs that are not bound by PEX19 and mediate protein import independently of PEX19. The two classes cannot be defined based on their amino acid sequence.